Dark Layered Sedimentary Rock Specimen - Geological Sample #3576077 (License: Personal Use)

The specimen displays prominent foliation and fine laminations, suggesting deposition in a quiet aquatic environment followed by mild metamorphism. Its matte black to dark gray surface exhibits subtle sheen along cleavage planes, indicating alignment of clay minerals or mica flakes. The irregular, angular shape suggests it was broken from a larger outcrop rather than naturally rounded.

Used in educational materials, museum displays, and geological field guides to illustrate sedimentary layering, lithification, or low-grade metamorphism; matches user intent for identifying rock types, studying stratigraphy, or sourcing imagery for science content.